- 行业: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
A device for controlling or amplifying electric currents by means of potential probes through a crystal of a semiconductor, commonly silicon or germanium.
Industry:Mining
A device for cooling compressed air between the compressor and the mine shaft. By cooling and dehumidifying the air, and thus reducing its volume, the capacity and efficiency of the pipeline are increased.
Industry:Mining
A device for determining the course and speed made good over the ground in shallow water, consisting of a lead or weight attached to a line. The lead is thrown overboard and allowed to rest on the bottom. The course being made good is indicated by the direction the line tends, and the speed by the amount of line paid out in unit time.
Industry:Mining
A device for determining the presence of water, usually electrically. Compare: divining rod.
Industry:Mining
A device for dewatering in which wet coal is thrown by centrifugal force against a perforated containing surface that permits the outward passage of water and retains the coal.
Industry:Mining
A device for dewatering mineral slurries, esp. waste from coal washing, which consists of a moving belt constructed of relatively open cloth. Belt presses are widely used in the minerals industry.
Industry:Mining
A device for directing a high-pressure jet of water in hydraulicking. It is essentially a swivel-mounted, counterweighted nozzle attached to a tripod or other type of stand and so designed that one person can easily control and direct the vertical and lateral movements of the nozzle.
Industry:Mining
A device for distributing a suspension of solids in water to a machine at a constant rate, or for retarding the rate of flow, as to a top-feed filter or for eliminating by overflow some of the finest particles.
Industry:Mining
A device for exerting a strong pull; may be used to withdraw steel arches from disused roadways. It consists of a framework containing a hand-operated drum, around which a steel rope 50 ft (15.24 m) in length is wound. To hold the drum in position a ratchet device is used with both gears. A simple reversing mechanism that disengages the ratchet is also attached. The winch is firmly anchored when in use.
Industry:Mining
